kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree build

KBUILD_SRC was conventionally used for some different purposes:
 [1] To remember the source tree path
 [2] As a flag to check if sub-make is already done
 [3] As a flag to check if Kbuild runs out of tree

For [1], we do not need to remember it because the top Makefile
can compute it by $(realpath $(dir $(lastword $(MAKEFILE_LIST))))

[2] has been replaced with self-commenting 'sub_make_done'.

For [3], we can distinguish in-tree/out-of-tree by comparing
$(srctree) and '.'

This commit converts [3] to prepare for the KBUILD_SRC removal.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

This commit is contained in:

Masahiro Yamada

2019-03-30 21:04:17 +09:00

parent 48b5ffd126

commit a9a49c2ad9

7 changed files with 9 additions and 9 deletions

									
										scripts/gdb/linux/Makefile
									
		+1
		-1
	
												View File
												
				@@ -1,6 +1,6 @@

				# SPDX-License-Identifier: GPL-2.0

				ifneq ($(KBUILD_SRC),)

				ifneq ($(srctree),.)

				symlinks := $(patsubst $(srctree)/$(src)/%,%,$(wildcard $(srctree)/$(src)/*.py))